A vendor arranges newspapers covering the preliminary tally of presidential candidates on front page, in TegucigalpaBy Gabriel Stargardter and Gustavo Palencia TEGUCIGALPA (Reuters) – Leftist Honduran presidential candidate Xiomara Castro refuses to accept partial official results that show her conservative rival on course to win Sunday's election, setting the stage on Monday for a drawn-out conflict. Castro, the wife of deposed leader Manuel Zelaya, and her team said early Monday that an exit poll drawn up for her party showed she was winning. A partial count issued by the electoral authority on Sunday gave National Party candidate Juan Hernandez some 34.3 percent support while Xiomara Castro had nearly 28.7 percent. "We do not use violence, weapons, but we know how to defend our rights." Manuel Zelaya was ousted in a 2009 coup after his opponents accused him of trying to seek re-election, which is banned under the constitution.